120332721 has 12 divisors (see below), whose sum is σ = 162525552. Its totient is φ = 79194024.

The previous prime is 120332701. The next prime is 120332743. The reversal of 120332721 is 127233021.

It is not a de Polignac number, because 120332721 - 2⁶ = 120332657 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120332701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15510 + ... + 21936.

It is an arithmetic number, because the mean of its divisors is an integer number (13543796).

Almost surely, 2^120332721 is an apocalyptic number.

It is an amenable number.

120332721 is a deficient number, since it is larger than the sum of its proper divisors (42192831).

120332721 is an frugal number, since it uses more digits than its factorization.

120332721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588 (or 6509 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 120332721 is about 10969.6272042399. The cubic root of 120332721 is about 493.6978611611.

Adding to 120332721 its reverse (127233021), we get a palindrome (247565742).

The spelling of 120332721 in words is "one hundred twenty million, three hundred thirty-two thousand, seven hundred twenty-one".